A METAL ENCLOSE FOR RFID APPLICATIONS

摘要

The present invention relates to a wireless recognizing metal container having an excellent recognizing rate by using three antennas. The wireless cognition metal container comprises: a metal container having both side surfaces and an upper surface on which antennas may be installed, and having an exit door and an entrance door for shielding wireless recognition electromagnetic waves; three antennas installed in the metal container and respectively having linearly polarized waves in different directions; a turntable for rotating a large item box; a conveyor belt for transporting an item box; and so on. The three antennas are disposed at regular intervals in a diagonal direction to apply spatial diversity. The linearly polarized antennas are respectively disposed in 135°, 0°, and 45° directions with respect to a horizontal direction to apply polarized diversity. Each of antennas is switched at high speed thereby wireless recognition tags mounted on a large quantity of items are recognized at high speed.